Preheating-furnace for welding castings



A. E. HAUCK PREHEATING FURNACE FOR WELDING CASTINGS.

APPLICATION FILED MN. 8, I920.

Patented June 29,1920.

2 SHEETSSHEET l.

I IIIIIIIIII llllrL- A. E. HAUCK. PREHEATING FURNACE FOR WELDINGCASTINGS.

APPLICATION FILED JAN. 8. 1920.

44 ,690, Patented June 29, 1920.

2 SHEETS SHEET 2.

I IIILlII/I INVENTO UNI-TED STATES;

PATENT ()FFlCE.

I ARTHUR E. HAUCK, or NEW YORK, N. Y.

rnEHEArme-runNAcn ron WELDING CASTINGS.

T 0 all whom it may concern: k

Be it known that I, ARTHUR E. HAUGK, a citizen of the United States, andaresident of the city of New York, county of Kings, and State of NewYork, have invented a new and useful Improvement in Preheating-Furnacesfor Welding Castings, of which the following is a specification.

The object of my invention is to provide a furnace on which a casting orother object may be placed and properly preheated before welding so thatthe welding heats will not crack or injure it.

A further object is to provide a cheap, durableand efficient furnace ofthis character. These objects are accomplished by my invention, oneembodiment of which is hereinafter more particularly set forth.

For a more particular description of my invention, reference is to behad to the accompanying drawings forming a part hereof, in which- Figure1 is a plan View of my improved furnace.

Figs. 2 and 3 are sectional views taken on the lines 22 and 33respectively, of Fig. 1, looking in the direction of the arrows.

Figs. 41- and 5 are perspective views of my improved form of fire brick,Fig. 4: showing the top, and Fig. 5 the bottom.

Throughout the various views of the drawings, similar referencecharacters des ignate similar parts.

My improved furnace 1 is mounted on legs 2 or any other suitablesupports, and is provided with an outer casing 3 which is lined withfire brick 4 which is laid both horizontally and vertically so as todivide the furnace into three chambers 5, 6 and 7. The upper edge of thecasing 3 is preferably provided with an angle 8 which. surrounds thesame, as indicated. The casing 3 has openings at one end opposite whichtwo burners 9 are placed,-which burners are opposite the chambers 5 and7 respectively, and the flames from these burners pass through thesechambers to the end walls and thence through openingsiinto the chamber6, as indicated.

Each vertically disposed fire brick tcarries a metal division plate 10and also a top fire brick 11, and at each end of each fire brick 11 is ametal division plate 12 which runs perpendicular to the plate 11.

Specification 0f Letters Patent Patented June 29, 1920.

Application filed January 8. 1920. .Serial No. 350,148.

The outside division plates 1(land 12 are 3 preferably held in.position'by' means of a lining of-fire brick or fire clay 13 or anyother suitable substance.

The top fire bricks 11 are all identical and each is provided with anupwardly arched bottom 14- with diagonally disposed perforations 15which open in a central groove 16 in the top of the fire brick and alsoextend to top side grooves 17, as shown. The purpose of these grooves isto permit flames to pass through the burners and lick the bottom ofanything that may be placed on the division plates 10 and 12. It will benoted thatv when the apparatus is set for use, as shown, these divisionplates extend well above the top fire bricks and protect them so thatwhen the casting is heated, its

expansion will take place on the division plates and not on the firebrick. Furthermore, when put in place, the casting will not restdirectly on the top fire brick in any event so that the bricks areprotected and space is always available for the flame action abovedescribed.

In view of the foregoing, the operation of my improved furnace willbereadily understood. Assuming that a suitable fuel is provided and theburners 9 are in operation in a normal way, flames from these burnerspass down through the chambers 5 and 7 and back through the chamber 6and thence back into the chambers 5 and 7 so forming an endless flame,and smaller flames pass through the holes 15 into the recess 16, andwhen a casting is over the fire bricks 11, these flames will pass intothe recesses 17 and reach upwardly and lick the bottom of the casting soas to thoroughly heat the same and make it ready for Welding. As thecasting expands, as above stated, it will expand on the division plates10 and 12 and do no injury to the furnace.

While I have shown and described one embodiment of my invention, it isobvious that it is not restricted thereto, but is broad enough' to coverall structures that come within the scope of the annexed claims.

Having thus described my invention, what I claim is:

1. A furnace provided with flame chambers, top fire bricks withperforations over said chambers and division plates adapted to receiveand support a casting surrounding said top fire bricks.

2. A top fire brick for furnaces provided with a central top recess,holes running therefrom to the bottom and side recesses connected to thecentral recess.

3-. A top brick for furnaces comprising an arched bottom with a centralrecess and diagonally disposed passages running to said bottom.

at. A furnace provided with a casing and three chambers, means forheating two of said chambers directly and connections between these twochambers and the remaining chamber, whereby the remaining chamber may beheated, top fire bricks over said chambers and division platessupporting the top fire bricks so that a casting may be heated on thefurnace out of contact with the top fire bricks.

5. A heating furnace with three parallel chambers, one on each side ofthe center chamber, openings between the center chamber and sidechambers, an end opening for each side chamber, perforations in the topof each chamber and burners opposite the end openings of the sidechambers, whereby flames may be blown into the side chambers, returnthrough the center chamber and re enter their respective side chambersand also protrude through the top openings in all chambers.

ARTHUR. E. HAUCK.

